Protect Your Landscape’s Trees & Shrubs with Horticultural Oil

If you want to protect your trees and shrubs this winter, make sure they get an application of horticultural oil, also called dormant oil. Dormant oil protects trees and shrubs from further insect and disease damage over the winter months.

Perfect timing

Late fall and early winter are the best times to apply horticultural oil when trees and shrubs enter their dormancy—hence the name, dormant oil. The oil should be sprayed onto trees and shrubs before temperatures go below 40°F. Some plants that benefit from dormant oil include

Deciduous trees and bushes

Fruit trees and shrubs

Roses.

If you noticed insect activity or fungal diseases on your landscape trees and shrubs this past summer, you need to hire your local landscape company today to apply horticultural oil to your woody plants.

Horticultural oil is made with petroleum or vegetable oil bases to starve or suffocate common insects such as

Aphids

Lace bug

Scale

Mealybug

Some caterpillars

White fly

Woolly adelgid.

Likewise, dormant horticultural oil interrupts or stops some disease-carrying insects from feeding off of your trees and shrubs. It can also kill overwintering insect eggs and fungal spores.

While it may not heal your infected trees and shrubs, horticultural oil will slow down the spread of disease and insect damage. And it keeps insects and fungal diseases from starting on healthy trees and shrubs.